Training camp report No. 10

Quarterback Colin Kaepernick will play no more than two series against the Baltimore Ravens in the teams’ exhibition opener, coach Jim Harbaugh said.

Harbaugh didn’t reveal how much his other starters will play Thursday. However, it’s safe to assume that it should be comparable to the playing time that Kaepernick receives.

Kaepernick got in more action Monday in a scaled-back practice than he is going to get against the Ravens on Thursday night. But not much. The scout team received a majority of the reps.

That was by design, Harbaugh said, given the 49ers play Thursday.

Kaepernick looked sharp on most of his passes. However, he once again had a fade route into the right corner of the end zone intercepted. This time, it was Perrish Cox doing the honors. Cox snared the ball before wide receiver David Reed could make a play.

— The 49ers waived/injured running back Kendall Hunter, who suffered a torn anterior cruciate ligament in his right knee earlier in training camp.

Hunter will wind up on the 49ers injured-reserve list unless he gets claimed by another team between now and Tuesday afternoon.

In response to being down at running back — LaMichael James is out a month or so with a dislocated left elbow — the 49ers signed running back Glenn Winston, who played collegiately at MichiganState.

— The Detroit Lions claimed wide receiver Jon Baldwin, one day after the 49ers placed Baldwin on waivers.

— Cornerback Chris Cook intercepted two passes Monday. On his second pick, Cook got inside position on receiver Chuck Jacobs, made a good read on the ball and picked off the Blaine Gabbert throw as he dived into the end zone.

Cook has yet to intercept a pass in an NFL regular-season game during his four seasons. Hence, defensive coordinator Vic Fangio said he instructed the quarterbacks to go after Cook during practice.

Perhaps that explains why Josh Johnson lofted a pass into double coverage that resulted in Cook’s first interception. Cook also got his hands on a third pass, but he wasn’t able to hang on to that one.

— Harbaugh said he doesn’t have a timetable for how long defensive tackle Glenn Dorsey is going to be sidelined with a torn biceps.

“That was definitely a big blow,” Harbaugh said of losing Dorsey. “He was playing really good, he had himself in great shape, ready for the season.”

Harbaugh also said he isn’t sure when injured wide receivers Michael Crabtree and Brandon Lloyd will be cleared to return to practice.

— Rookie running back Carlos Hyde had a few rough moments during practice. At one point, he fumbled a kick-off and had difficulty picking up the loose ball. Harbaugh said Hyde injured a fingernail on the play. Hyde later dropped a well-thrown slant across the middle.

— Harbaugh said he and his brother John have “knocked out” the joint practices scheduled for Saturday, Sunday and Monday. “We got a good plan.”

— Cornerbacks Tramaine Brock and Chris Culliver were among those who missed practice. Safety C.J. Spillman returned to practice one day after he missed most of the proceedings.

— Fans applauded Harbaugh as he jogged toward the sideline to speak with one of his assistant coaches late in practice. Harbaugh acknowledged the fans by doffing his cap and smiling.

— Harbaugh admitted that he glanced at the video boards on occasion during practice. Tough to blame him, either, for it’s every bit as good as watching the action live.

In some ways, it’s better because you get an aerial view of plays and, therefore, a better feel for how and why things unfolded the way they did.

The downside is, you might find yourself watching a game you’re attending on the big screen and not with your own eyes. In this case, that’s not so bad.

— Of the 90 players on the roster, only 69 were healthy enough to practice Monday, Harbaugh said.